134 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



the posterior acute ; between it and the post-ocular lobe there is a small tooth 

 on the orbital margin. 



The basal antennal joint has a spine at its anterior outer angle visible from 

 above. The merus of the outer maxillipeds is expanded at the antero-external 

 angle. 



The chelipeds and legs are more or less roughened. The chelipeds of the 

 male are a little stouter than the trunk-legs and one and a third times as long 

 as the carapace, enclusive of rostrum. The palm has on its outer face 2 longi- 

 tudinal furrows which are continued on the fingers ; these are gaping for two- 

 thirds their length. 



The first ambulatory leg is two and a third times as long as the carapace 

 (rostrum excluded) ; though longer than the second pair, there is hardly more 

 difference than between the second and third. The fourth leg is missing. The 

 merus joints are armed with 3 or 4 long slender spines, the carpal joints with 

 two. Dactyli very slender and spinulous. 



The ridges of the sternum and abdomen are granulated. 



Dimensions. — Length of carapace exclusive of horns, 4.7 mm., width, 3.4 

 mm., length of horns, 2.3 mm. 



Type locality. — One male was taken at Nallandu at the anchorage in 24 

 fathoms, January 18. 



The tooth on the superior orbital margin connects this species with the genus 

 Naxioides; the spines on the legs separate it from other species of Halimus. 



PARTHENOPID^. 

 Lambrus (Rhinolambrus) longispinis Miers. 



Lambrus {Rhinolambrus) longispinis Alcock, Journ. Asiatic Soc. Bengal, LXIV. 266, 

 1896, and synonymy. 



Centre of Male Lagoon, 30 fathoms, December 26 ; one female with ova, 

 7.7 mm. long, 7.2 mm. wide. 



Larabrus (Rhinolambrus) bispinosus, sp. nov. 



Figs. 1-2. 



Carapace nearly as long as wide ; 2 strong median spines, one gastric, the 

 other cardiac ; a blunt oblique ridge on the branchial region, between which 

 and the gastric and cardiac regions are two pits ; postero-lateral angle strongly 

 elevated ; irregular granules distributed sparingly on the branchial ridge and 

 between it and the cardiac region, on the slopes of the cardiac region, on the 

 anterior half of the gastric region, hepatic region slightly roughened, a single 

 granule on the genital region. Otherwise the carapace is almost smooth. 



The rostrum is broad, prominent, declivous, blunt. 



